Detailed Instructions: Given an English sentence, convert it into the french language.
Problem:When the monetary authorities implemented the advice of Coombs to have a flexible interest rate , it allowed the bank to rely more on open market operations .
Solution:
Lorsque les autorités monétaires suivirent les conseils de Coombs d' avoir un taux d' intérêt flexible , il a permis à la Banque de s' appuyer davantage sur les opérations d' open market .